Papaver cambricum L.
Welsh Poppy, Yellow Poppy
Meconopsis cambrica, Argemone cambrica, Cerastites cambricus, Papaver flavum, Papaver luteum, Stylophorum cambricum
Bloom Time: From mid-spring through fall
Papaver cambricum is an attractive perennial plant, up to 1.5 feet (45 cm) tall, with numerous silky, lemon yellow flowers that are up to 1.5 inches (3.8 cm) in diameter. The flowers are borne in abundance on branched stems from mid-spring through fall.
How to Grow and Care
Plant Corn Poppy seeds directly on top of cultivated soil. In mild climates, plant the seeds in late fall or early spring when soil temperatures are between 60 and 70 ºF (15 and 21 ºC). Corn Poppies thrive in full sunlight and rich, well-drained soil. If the soil is poor, incorporate 2 to 3 inches (5 to 7.5 cm) of compost or manure before planting.
Water Corn Poppies when the top of the soil feels dry. Saturate the root zone thoroughly, as shallow waterings promote a shallow root system. For best results, water by hand with a hose or use a drip system to keep the foliage as dry as possible. If you use a sprinkler, water early in the day, so the foliage has time to dry before evening. Soggy soil and damp foliage place the plant at risk of rot and fungal diseases.
Spread 1 to 2 inches (2.5 to 5 cm) of mulch around the plants in the spring. An organic mulch such as shredded leaves or dry grass clippings keeps the roots cool, conserves moisture, and prevents the growth of weeds.
Apply a balanced liquid or granular fertilizer if newly emerging foliage has a yellowish appearance. Use the fertilizer following label recommendations. As a general rule, Poppies require no supplemental fertilization if granular fertilizer or compost is incorporated into the soil at planting time. See more at How to Grow and Care for Corn Poppy.
Native to damp, rocky sites in upland areas of Western Europe from the British Isles to the Iberian Peninsula.